Results 101 to 110 of about 43,226 (214)

Collision-induced galaxy formation: semi-analytical model and multi-wavelength predictions

, 2003
A semi-analytic model is proposed that couples the Press-Schechter formalism for the number of galaxies with a prescription for galaxy-galaxy interactions that enables to follow the evolution of galaxy morphologies along the Hubble sequence.
Balland, Christophe, Devriendt, Julien E. G., Silk, Joe   +2 more
core   +3 more sources

The Stochastic‐Dissipative Störmer Problem‐Trajectories and Radiation Patterns

Annalen der Physik, Volume 537, Issue 12, December 2025.
We consider charged particle motion and radiation in a dipole magnetic field, in the presence of friction and of stochastic forces. The numerical solutions of the Langevin equation reveal how these forces modify the complex dynamics of particles, and they offer some new insights into the nonlinear processes relevant to planetary radiation belts ...
Tiberiu Harko, Gabriela Raluca Mocanu
wiley   +1 more source

Emergence of the Galaxy Morphology–Star Formation Activity–Clustercentric Radius Relations in Galaxy Clusters

The Astrophysical Journal
We investigate when and how the relations of galaxy morphology and star-forming activity with clustercentric radius become evident in galaxy clusters. We identify 162 galaxy clusters with total mass ${{M}}_{\mathrm{tot}}^{\mathrm{cl}}\gt 5\times {10}^{13}
Sungwook E. Hong, Changbom Park, Preetish K. Mishra, Juhan Kim, Brad K. Gibson, Yonghwi Kim, C. Gareth Few, Christophe Pichon, Jihye Shin, Jaehyun Lee   +9 more
doaj   +1 more source

The z-structure of disk galaxies towards the galaxy planes [PDF]

, 1997
We present a detailed study of a statistically complete sample of highly inclined disk galaxies in the near-infrared K' band. Since the K'-band light is relatively insensitive to contamination by galactic dust, we have been able to follow the vertical ...
de Grijs, R., Peletier, R. F., van der Kruit, P. C.   +2 more
core   +1 more source

Fuel for Galaxy Disks

, 2008
10 pages, 5 figures, to appear in Formation and Evolution of Galaxy Disks, ASP Conf. Proc., eds. J.G. Funes & E.M.
Putman, M. E., Grcevich, J., Peek, J. E. G.   +2 more
openaire   +2 more sources

Virgo Filaments. IV. Using WISE to Measure the Modification of Star-forming Disks in the Extended Regions Around the Virgo Cluster

The Astrophysical Journal
Recent theoretical work and targeted observational studies suggest that filaments are sites of galaxy preprocessing. The aim of the WISESize project is to directly probe galaxies over the full range of environments to quantify and characterize extrinsic ...
Kim Conger, Gregory Rudnick, Rose A. Finn, Gianluca Castignani, John Moustakas, Benedetta Vulcani, Daria Zakharova, Lizhi Xie, Francoise Combes, Pascale Jablonka, Yannick Bahé, Gabriella De Lucia, Vandana Desai, Rebecca A. Koopmann, Dara Norman, Melinda Townsend, Dennis Zaritsky   +16 more
doaj   +1 more source

Parametric Survey of Nonaxisymmetric Accretion Disk Instabilities: Magnetorotational Instability to Super-Alfvénic Rotational Instability

The Astrophysical Journal
Accretion disks are highly unstable to magnetic instabilities driven by shear flow, where classically, the axisymmetric, weak-field magnetorotational instability (MRI) has received much attention through local WKB approximations.
Nicolas Brughmans, Rony Keppens, Hans Goedbloed   +2 more
doaj   +1 more source

UGC 7388: a galaxy with two tidal loops

, 2009
We present the results of spectroscopic and morphological studies of the galaxy UGC7388 with the 8.1-m Gemini North telescope. Judging by its observed characteristics, UGC7388 is a giant late-type spiral galaxy seen almost edge-on.
B. C. Whitmore, Ch. Brocca, F. Schweizer, G. Monnet, I. F. Fernandes, J. Dubinski, J. K. Adelman-McCarthy, K. O’Neil, L. Bottinelli, M. de Oliveira-Abans, M. Faúndez-Abans, M. R. Blanton, O. K. Silchenko, R. A. Ibata, R. B. Tully, R. B. Tully, R. Ibata, V. P. Reshetnikov, V. P. Reshetnikov, V. P. Reshetnikov, V. Reshetnikov, V. Reshetnikov, V. Reshetnikov, Zh. Shang   +23 more
core   +1 more source

Counter-Rotation in Disk Galaxies

, 2014
Counter-rotating galaxies host two components rotating in opposite directions with respect to each other. The kinematic and morphological properties of lenticulars and spirals hosting counter-rotating components are reviewed. Statistics of the counter-rotating galaxies and analysis of their stellar populations provide constraints on the formation ...
openaire   +3 more sources

Gas dynamics and disk-galaxy evolution [PDF]

Symposium - International Astronomical Union, 1985
Gas dynamics plays a vital role in the formation and ongoing evolution of a disk galaxy through its ability to have dissipative collisions. In this paper the simplest possible gas physics which provides a description of a gaseous component is incorporated into N-body experiments to investigate the formation of a disk galaxy.
openaire   +1 more source